Contra Costa county is the only one banning the .50 cal rifle.
Sorry to hear about this. Still, I have written off California a long time ago. Let the gun grabbers have their way out there as an example of what can happen in the rest of the country. Sadly, I think California is too far gone for anything else.
For now. Although AB50 (and AB50 also bans .50 revolvers) has been beaten back, it can also come back. The Assembly and Senate are notorious for resurrecting these things.